Specific recognition of DNA bulge structure by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry

doi:10.1002/rcm.1377

淡江大學機構典藏 > 理學院 > 化學學系暨研究所 > 期刊論文 > Item 987654321/25222

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题名:	Specific recognition of DNA bulge structure by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry
作者:	Chen, Yu-ju;Chen, Po-jui;Wang, Hsueh-ting;Cheng, Chien-chung;鄭建中
贡献者:	淡江大學化學學系
日期:	2004-03-30
上传时间:	2009-12-01
出版者:	John Wiley & Sons
摘要:	This study reports a novel approach utilizing an octahedral CoII(HAPP)(TFA)2 reagent in the presence of H2O2 with analysis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) to serve as an efficient probe for bulged DNA structures. Elucidation of DNA bulge-specific recognition pathways and cleavage mechanisms is demonstrated by characterization of bulge-specific cleavage products and other backbone lesion fragments. The cleavage specificity of CoII(HAPP)(TFA)2/H2O2 arises from sugar oxidative strand scission, for which the position of the abstracted hydrogen is unambiguously determined as the 4'-H of the deoxyribose moiety. Furthermore, differentiation between bulge-specific recognition and diffusion-controlled non-selective cleavage can be clarified through time-dependent MALDI-TOFMS studies. The present results demonstrate that MALDI-TOFMS can be a sensitive and efficient technique for complex mechanistic studies of this kind, providing information for future rational drug design targeting bulged DNA structures.
關聯:	Rapid Communications in Mass Spectrometry 18(6), pp.609-616
DOI:	10.1002/rcm.1377
显示于类别:	[化學學系暨研究所] 期刊論文

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